On my 630 rear brake tip I used a Touratech G650X (discontinued) brake pedal tip others have used diffrent tips. I had to reshape the end of the lever a little with a file. Drill out that rivet. A little bit of work but not major repairs. If you use the search function for "brake pedal" and comb a few threads there are options that show up. Also probably easiest to remove the lever to perform the mods.
There is a cast aluminum replacement part available from Australia on Ebay... I haven't used it but it looks decent (and correct shape, splines etc) in the pictures... Kinda price 70 bucks from memory.
